Grain-heater



(No Model.)

"W. N. DURANT. Grain Heater.

No. 231,157. Patented Aug. 17,1880.

UNITED STATES PATENT OFFICE.

WALTER N. DURANT, OF MILWAUKEE, WISCONSIN.

GRAIN-HEATER.

SPECIFICATION formingpart of Letters Patent No. 231,157, dated August 17, 1880.

(No model.)

To all whom it may concern:

Be it known that I, WALTER N. DURANT, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Grain-Heaters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to improvementsin devices for heating grain preparatory to grindmg.

The object of my improvements is to provide a device for indicating the temperature of the grain as it flows from the heater to the millstone.

-My invention consists in the peculiar construction and arrangement of a thermometer with a grain-heater, whereby the bulb of the thermometer is shielded from the varyingcue rents of the exterior P atmosphere and indicates the slightest variations in the temperature of the grain.

My invention is further explained by reference to the accompanying drawings, in which Figure 1 represents a perspective elevation. Fig. 2 is a vertical section of the same.

Like parts are represented by the same reference-letters throughout the several views.

The cylindrically-shaped vessel A forms the body of the heater, which is heated by steam. The steam enters through the opening B and escapes through the opening 0. The upper end of the cylinder is provided with a hopper, D, through which the grain is conveyed in a continuous stream to the interior of the heater, Where it is evenly distributed in the corrugated heating-cells F F F.

Two very important objects are attained by the peculiar corrugated walls of the cells F.

First, it affords a greater extent of heatingsurface than straight cells; second, they have a tendency to mix up the grain and bring all parts of the current of grain against the heated walls of the cells, thereby heating the grain more thoroughly and evenly.

As the grain escapes from the cells F F F it falls upon the center of the convex plate E, from which it radiates outwardly in all directions toward the walls of the cylinder A, and thus a uniform flow of grain from all the cells is attained.

When the grain falls from the plate E it is conveyed through the funnel-shaped base G to the pipe H. The pipe H is provided with a thermometer, I, by which the temperature of the heated grain is ascertained asit flowsfrom the heater to the millstones.

The tube J of the thermometer is bent inwardly toward the center of the pipe at an obtuse angle, thus bringing the bulb 7c of the thermometer at the center of the pipe.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The improvements in grain-heaters herein described, consisting of the combination of the escape-spout H with thermometer I, having angular bent tube J, whereby the bulb of the thermometer is brought into the center of the spout, substantially as and for the purpose specified.

2. The improvements in grain-heaters herein described, consisting in the combination of cylinder A, centrally-located corrugated cells F F F, spout H, and thermometer I, having angular bent tube J, all substantially as and for the purpose specified.

In testimony whereof I affix my signature in presence of two witnesses.

WALTER N. DURANT.

Witnesses:

JAMES B. ERWIN, W. J. SiNNo'rT. 

